Removable articulated striker cylinder for stenographic and like machines



Jami 20; -192s.-- 1,523,480

M; GRANDJEAN REMOVABLE ARTIVCULATED STRIKER CYLiNDER'FOR STENOGRAPHICAND LIKE MACHINE Filed Deb. 13. 1921 Patented Jan. 20, 1925.

PATENT 5;?

MARC GRANDJEAN,

OF PARIS, FRANCE,

REMOVABLE ARTICULATED STRIKER CYLINDER FOR STENOGR-APHIC AND LIKEMACHINES.

Application filed December 13, 1921.

To all whom it may concern:

Be it known that I, Mano GRANDJEAN, a citizen of the Republic of France,and residing at Paris, Seine Department, Bourse du Commerce, Rue duLouvre, in the Re public of France, industrial, have invented certainnew and useful Removable Articulated Striker Cylinders for Stenographicand like Machines, of which the following is a specification.

My invention relates to a removable platen for stenographic and likemachines whereof the principle characteristic consists in the fact thatthe said platen is adapted to assume the operative position and to beinstantly withdrawn therefrom by pivoting upon a shaft, therebyproviding for the dif ferent operations of the machine and especiallyfor the insertion and removal of paper in sheets or strips which is usedin the printing of the characters.

The accompanying drawing is a diagram matic view of an embodiment of theinvention.

The device consists essentially of a shaft 1 secured to a pivot 2 whichis revoluble in the bearings 3 mounted upon the machine frame. The otherend of the shaft 1 is held in the operative position in a notch 4 in themachine frame by a catch 5 pivoted thereon and submitted to the actionof thespring 6. A spring 7 acting upon the pivot 2 ef fects the upwardreturn of the shaft 1, in such manner that by releasing the fasteningcatch 5, the shaft and the platen 8 mounted thereupon will beautomatically raised, the action thus tending to give the movableportion the position shown in dotted lines.

To bring the platen into the operative position, the movable portion iscaused to pivot in the downward direction by acting Serial No. 522,103.

on the button 9 disposed on the end of the shaft 1; the spring 7 is nowset, and the shaft 1 pushes aside the said catch and enters the notch t;the spring 6 returns the said catch upon the shaft 1 which is therebyheld in place against the effort of the spring 7 tending to withdraw thesame.

The platen is loosely revoluble on the shaft 1 and is held in place uponthe latter at one end by the pivot 2 and at the other end by a stop ring10. The platen has disposed on the end thereof a driving member 11connected with the mechanism of the said machine which effects therotation of the same in the proper sense and to the required extentaccording to circumstances. The paper may be drawn along by means of oneor more rollers 12 which arepressed against the platen by suitablesprings, not shown, and providing for the movement of the paper byadhesion as in the case of typewriting machines.

Claim:

In a stenographic machine, the combination of a rod provided at one ofits ends with transverse horizontal pivots, a spring which tends toraise the said rod about the said pivots, locking means engaging the opposite end of the rod in order to maintain the same in the loweredposition, a cylindrical platen rotatably mounted on this rod and adriving member secured to the said platen and which serves for themechanical driving of the latter.

In testimony, that I claim the foregoing as my invention I have signed.my name in presence of two subscribing witnesses.

ll [ARC .lRANDJEAN. lVitnesses JOHN F. SiMoNs, MAURICE Roux.

